import java.util.Scanner;

public class test2 {
    public static void main(String[] args) {

        System.out.println("商品  单价  数量 金额");
       String[] names = {"钢笔/t","笔记本/t","mp3/t"};
       double[] price = {28.0,15.0,128};
        Scanner sc = new Scanner(System.in);
        System.out.println("钢笔数量：");


        }
    }

